HARARE, Zimbabwe (CNN) -- Illegal diamond mining by Zimbabwean troops is leading to bloodshed and attacks against civilians, said a global watchdog group formed to cut the flow of so-called "blood diamonds."

Film made by Shepherd Yuda,who fled Zim this wk, shows how Harare jail staff had to vote under Zanu-PF supervision. At Zanu-PF rallies, voters told to pretend illiterate so ballot filled in for them. Also filmed MDC gen secretary Tendai Biti in leg irons